René's URL Explorer Experiment

Title: GitHub - xiawen0731/JavaRedis: 一个用java写的redis服务器 · GitHub

Open Graph Title: GitHub - xiawen0731/JavaRedis: 一个用java写的redis服务器

X Title: GitHub - xiawen0731/JavaRedis: 一个用java写的redis服务器

Description: 一个用java写的redis服务器. Contribute to xiawen0731/JavaRedis development by creating an account on GitHub.

Open Graph Description: 一个用java写的redis服务器. Contribute to xiawen0731/JavaRedis development by creating an account on GitHub.

X Description: 一个用java写的redis服务器. Contribute to xiawen0731/JavaRedis development by creating an account on GitHub.

Opengraph URL: https://github.com/xiawen0731/JavaRedis

X: @github

direct link

Domain: github.com

route-pattern	/:user_id/:repository
route-controller	files
route-action	disambiguate
fetch-nonce	v2:f5da4cde-5f30-5b12-ccdc-ed29087f8753
current-catalog-service-hash	f3abb0cc802f3d7b95fc8762b94bdcb13bf39634c40c357301c4aa1d67a256fb
request-id	D322:14011B:245D5A3:3211958:6A4F44C6
html-safe-nonce	98c082595ba9e1f37e4daa3a8482243e19e6759af5f6d5df07fc92bf7190cd80
visitor-payload	eyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiJEMzIyOjE0MDExQjoyNDVENUEzOjMyMTE5NTg6NkE0RjQ0QzYiLCJ2aXNpdG9yX2lkIjoiODMwOTM2MjUzOTQ1NzYyNzMzNCIsInJlZ2lvbl9lZGdlIjoiaWFkIiwicmVnaW9uX3JlbmRlciI6ImlhZCJ9
visitor-hmac	ba32ebdabc3f932716613fa4819749e509ece53a5f5e074ae7c176901e7d3fc9
hovercard-subject-tag	repository:166381747
github-keyboard-shortcuts	repository,copilot
google-site-verification	Apib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-url	https://collector.github.com/github/collect
analytics-location	//
fb:app_id	1401488693436528
apple-itunes-app	app-id=1477376905, app-argument=https://github.com/xiawen0731/JavaRedis
twitter:image	https://opengraph.githubassets.com/0cd12c74be60d284bc191ffad66b55469bbde05a058ea08089e4028f79b06bf9/xiawen0731/JavaRedis
twitter:card	summary_large_image
og:image	https://opengraph.githubassets.com/0cd12c74be60d284bc191ffad66b55469bbde05a058ea08089e4028f79b06bf9/xiawen0731/JavaRedis
og:image:alt	一个用java写的redis服务器. Contribute to xiawen0731/JavaRedis development by creating an account on GitHub.
og:image:width	1200
og:image:height	600
og:site_name	GitHub
og:type	object
hostname	github.com
expected-hostname	github.com
None	b92d11c0aa4a77d54ef4af1078b6a15fb5a70a215b30c4ecf28889d5a8e656d9
turbo-cache-control	no-cache
go-import	github.com/xiawen0731/JavaRedis git https://github.com/xiawen0731/JavaRedis.git
octolytics-dimension-user_id	26342209
octolytics-dimension-user_login	xiawen0731
octolytics-dimension-repository_id	166381747
octolytics-dimension-repository_nwo	xiawen0731/JavaRedis
octolytics-dimension-repository_public	true
octolytics-dimension-repository_is_fork	true
octolytics-dimension-repository_parent_id	143836886
octolytics-dimension-repository_parent_nwo	pyb1993/JavaRedis
octolytics-dimension-repository_network_root_id	143836886
octolytics-dimension-repository_network_root_nwo	pyb1993/JavaRedis
turbo-body-classes	logged-out env-production page-responsive
disable-turbo	false
browser-stats-url	https://api.github.com/_private/browser/stats
browser-errors-url	https://api.github.com/_private/browser/errors
release	4b249b445842943ed31549e027f57a8ade9881ed
ui-target	full
theme-color	#1e2327
color-scheme	light dark

Links:

Skip to content	https://github.com/xiawen0731/JavaRedis#start-of-content
	https://github.com/
Sign in	https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fxiawen0731%2FJavaRedis
GitHub CopilotWrite better code with AI	https://github.com/features/copilot
GitHub Copilot appDirect agents from issue to merge	https://github.com/features/ai/github-app
MCP RegistryNewIntegrate external tools	https://github.com/mcp
ActionsAutomate any workflow	https://github.com/features/actions
CodespacesInstant dev environments	https://github.com/features/codespaces
IssuesPlan and track work	https://github.com/features/issues
Code ReviewManage code changes	https://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilities	https://github.com/security/advanced-security
Code securitySecure your code as you build	https://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they start	https://github.com/security/advanced-security/secret-protection
Why GitHub	https://github.com/why-github
Documentation	https://docs.github.com
Blog	https://github.blog
Changelog	https://github.blog/changelog
Marketplace	https://github.com/marketplace
View all features	https://github.com/features
Enterprises	https://github.com/enterprise
Small and medium teams	https://github.com/team
Startups	https://github.com/enterprise/startups
Nonprofits	https://github.com/solutions/industry/nonprofits
App Modernization	https://github.com/solutions/use-case/app-modernization
DevSecOps	https://github.com/solutions/use-case/devsecops
DevOps	https://github.com/solutions/use-case/devops
CI/CD	https://github.com/solutions/use-case/ci-cd
View all use cases	https://github.com/solutions/use-case
Healthcare	https://github.com/solutions/industry/healthcare
Financial services	https://github.com/solutions/industry/financial-services
Manufacturing	https://github.com/solutions/industry/manufacturing
Government	https://github.com/solutions/industry/government
View all industries	https://github.com/solutions/industry
View all solutions	https://github.com/solutions
AI	https://github.com/resources/articles?topic=ai
Software Development	https://github.com/resources/articles?topic=software-development
DevOps	https://github.com/resources/articles?topic=devops
Security	https://github.com/resources/articles?topic=security
View all topics	https://github.com/resources/articles
Customer stories	https://github.com/customer-stories
Events & webinars	https://github.com/resources/events
Ebooks & reports	https://github.com/resources/whitepapers
Business insights	https://github.com/solutions/executive-insights
GitHub Skills	https://skills.github.com
Documentation	https://docs.github.com
Customer support	https://support.github.com
Community forum	https://github.com/orgs/community/discussions
Trust center	https://github.com/trust-center
Partners	https://github.com/partners
View all resources	https://github.com/resources
GitHub SponsorsFund open source developers	https://github.com/open-source/sponsors
Security Lab	https://securitylab.github.com
Maintainer Community	https://maintainers.github.com
Accelerator	https://github.com/open-source/accelerator
GitHub Stars	https://stars.github.com
Archive Program	https://archiveprogram.github.com
Topics	https://github.com/topics
Trending	https://github.com/trending
Collections	https://github.com/collections
Enterprise platformAI-powered developer platform	https://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security features	https://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI features	https://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 support	https://github.com/enterprise/premium-support
Pricing	https://github.com/pricing
Search syntax tips	https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentation	https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in	https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fxiawen0731%2FJavaRedis
Sign up	https://github.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E&source=header-repo&source_repo=xiawen0731%2FJavaRedis
Reload	https://github.com/xiawen0731/JavaRedis
Reload	https://github.com/xiawen0731/JavaRedis
Reload	https://github.com/xiawen0731/JavaRedis
xiawen0731	https://github.com/xiawen0731
JavaRedis	https://github.com/xiawen0731/JavaRedis
pyb1993/JavaRedis	https://github.com/pyb1993/JavaRedis
Notifications	https://github.com/login?return_to=%2Fxiawen0731%2FJavaRedis
Fork 0	https://github.com/login?return_to=%2Fxiawen0731%2FJavaRedis
Star 0	https://github.com/login?return_to=%2Fxiawen0731%2FJavaRedis
Code	https://github.com/xiawen0731/JavaRedis
Pull requests 0	https://github.com/xiawen0731/JavaRedis/pulls
Actions	https://github.com/xiawen0731/JavaRedis/actions
Projects	https://github.com/xiawen0731/JavaRedis/projects
Security and quality 0	https://github.com/xiawen0731/JavaRedis/security
Insights	https://github.com/xiawen0731/JavaRedis/pulse
Code	https://github.com/xiawen0731/JavaRedis
Pull requests	https://github.com/xiawen0731/JavaRedis/pulls
Actions	https://github.com/xiawen0731/JavaRedis/actions
Projects	https://github.com/xiawen0731/JavaRedis/projects
Security and quality	https://github.com/xiawen0731/JavaRedis/security
Insights	https://github.com/xiawen0731/JavaRedis/pulse
	https://github.com/xiawen0731/JavaRedis
Branches	https://github.com/xiawen0731/JavaRedis/branches
Tags	https://github.com/xiawen0731/JavaRedis/tags
	https://github.com/xiawen0731/JavaRedis/branches
	https://github.com/xiawen0731/JavaRedis/tags
18 Commits	https://github.com/xiawen0731/JavaRedis/commits/master/
	https://github.com/xiawen0731/JavaRedis/commits/master/
java_pid1167.hprof.hwcache	https://github.com/xiawen0731/JavaRedis/tree/master/java_pid1167.hprof.hwcache
java_pid1167.hprof.hwcache	https://github.com/xiawen0731/JavaRedis/tree/master/java_pid1167.hprof.hwcache
src/main/java	https://github.com/xiawen0731/JavaRedis/tree/master/src/main/java
src/main/java	https://github.com/xiawen0731/JavaRedis/tree/master/src/main/java
.DS_Store	https://github.com/xiawen0731/JavaRedis/blob/master/.DS_Store
.DS_Store	https://github.com/xiawen0731/JavaRedis/blob/master/.DS_Store
.gitignore	https://github.com/xiawen0731/JavaRedis/blob/master/.gitignore
.gitignore	https://github.com/xiawen0731/JavaRedis/blob/master/.gitignore
Netty_Demo_1.iml	https://github.com/xiawen0731/JavaRedis/blob/master/Netty_Demo_1.iml
Netty_Demo_1.iml	https://github.com/xiawen0731/JavaRedis/blob/master/Netty_Demo_1.iml
netty_demo_1.properties	https://github.com/xiawen0731/JavaRedis/blob/master/netty_demo_1.properties
netty_demo_1.properties	https://github.com/xiawen0731/JavaRedis/blob/master/netty_demo_1.properties
readMe.md	https://github.com/xiawen0731/JavaRedis/blob/master/readMe.md
readMe.md	https://github.com/xiawen0731/JavaRedis/blob/master/readMe.md
README	https://github.com/xiawen0731/JavaRedis
	https://github.com/xiawen0731/JavaRedis#这是一个用netty实现的redis服务器
	https://github.com/xiawen0731/JavaRedis#目的有三
	https://github.com/xiawen0731/JavaRedis#目前实现的功能
	https://github.com/xiawen0731/JavaRedis#version-1架构
	https://github.com/xiawen0731/JavaRedis#handler
	https://github.com/xiawen0731/JavaRedis#编码解码
	https://github.com/xiawen0731/JavaRedis#协议格式
	https://github.com/xiawen0731/JavaRedis#数据库部分
	https://github.com/xiawen0731/JavaRedis#实现了hyperloglog数据结构
	https://github.com/xiawen0731/JavaRedis#基本原理
	https://www.codecogs.com/eqnedit.php?latex=$&space;P(X_i&space;<=&space;K)&space;=&space;(1&space;-&space;(1/2)^k)^n$
	https://www.codecogs.com/eqnedit.php?latex=\bg_black&space;\large&space;$&space;1&space;-&space;(1&space;-&space;(1/2)^{k-1})^n&space;$
	https://www.codecogs.com/eqnedit.php?latex=\large&space;$&space;2^K&space;$
	https://github.com/xiawen0731/JavaRedis#实现步骤
	https://github.com/xiawen0731/JavaRedis#实现
	https://github.com/xiawen0731/JavaRedis#实际上这几个参数一个都不能少否则误差就会变大原理和实现还是差距很大的具体推导感兴趣的自己取看paperredis源码里面给了paper的名字
	https://github.com/xiawen0731/JavaRedis#version-2架构
	https://github.com/xiawen0731/JavaRedis#-同步删除的策略
	https://github.com/xiawen0731/JavaRedis#-异步删除的策略
	https://github.com/xiawen0731/JavaRedis#上面这样做第一是对原来的redismap进行了封装但是并没有对原有的数据操作所以无论数据有多少都是o1的操作
	https://github.com/xiawen0731/JavaRedis#第二所有转换都在主线程里面执行所以不需要考虑转换过程带来的线程安全的问题
	https://github.com/xiawen0731/JavaRedis#第三转换完成之后就可以提交任务让异步线程也对该redishashmap进行操作了这个时候操作一定是线程安全的
	https://github.com/xiawen0731/JavaRedis#第四一般这种操作竞争的程度并不高一共就几个异步线程进行操作所以性能损失不大而且每个操作很迅速所以自己写了一个简单的spin-lock用来进行保护即可具体内容见redisconcurrenthashmapclass
	https://github.com/xiawen0731/JavaRedis#最后我们只需要在异步线程结束之后在主线程将状态转换回来即可这种情况下只能让主线程去轮训提交的异步任务的future只要future完成就执行对应的回调具体内容见expirefuturejava部分
	https://github.com/xiawen0731/JavaRedis#此外还有一些小的优化这里就不一一赘述了
	https://github.com/xiawen0731/JavaRedis#version-3
	https://github.com/xiawen0731/JavaRedis#改动1--增加了对于渐进式rehash的支持为了达到这个目的我重写了redishashmap其实就是把jdk源码抄了一部分过来
	https://github.com/xiawen0731/JavaRedis#改动2--增加了异步线程进行rehash的支持重点是确保线程安全使得删除过期rehash以及主线程rehash协作运行
	https://github.com/xiawen0731/JavaRedis#思路设计
	https://github.com/xiawen0731/JavaRedis#-渐进rehash的支持
	https://github.com/xiawen0731/JavaRedis#-主线程渐进式rehash的逻辑
	https://github.com/xiawen0731/JavaRedis#-异步线程的逻辑
	https://github.com/xiawen0731/JavaRedis#-线程安全和性能的讨论
	https://github.com/xiawen0731/JavaRedis#--锁的实现
	https://github.com/xiawen0731/JavaRedis#-状态改变的条件
	https://github.com/xiawen0731/JavaRedis#version-4
	https://github.com/xiawen0731/JavaRedis#改动--针对gc频繁的问题将最常用的数据结构string改造为redisstring并且实现了一套对象池的技术手动管理很多对象的分配释放统计信息等策略
	https://github.com/xiawen0731/JavaRedis#首先说明一下idea的来源由于运行的时候发现gc在高负载的时候非常的频繁差不多1s就会产生一次gc所以思考怎么解决这个问题
	https://github.com/xiawen0731/JavaRedis#思路如下-首先我们需要知道gc频繁的原因因为每一次请求都会生成大量的临时对象
	https://github.com/xiawen0731/JavaRedis#那么将新生代扩大是不是能够解决这个问题呢
	https://github.com/xiawen0731/JavaRedis#这就得出一个结论必须将所有的string都替换成一个我们自己设计的可以池化的类型-redisstring
	https://github.com/xiawen0731/JavaRedis#这里实现的时候有这么一些难点
Readme	https://github.com/xiawen0731/JavaRedis#readme-ov-file
Please reload this page	https://github.com/xiawen0731/JavaRedis
Activity	https://github.com/xiawen0731/JavaRedis/activity
0 forks	https://github.com/xiawen0731/JavaRedis/forks
Report repository	https://github.com/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fxiawen0731%2FJavaRedis&report=xiawen0731+%28user%29
Releases	https://github.com/xiawen0731/JavaRedis/releases
Packages 0	https://github.com/users/xiawen0731/packages?repo_name=JavaRedis
Please reload this page	https://github.com/xiawen0731/JavaRedis
Contributors	https://github.com/xiawen0731/JavaRedis/graphs/contributors
Please reload this page	https://github.com/xiawen0731/JavaRedis
	https://github.com
Terms	https://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacy	https://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Security	https://github.com/security
Status	https://www.githubstatus.com/
Community	https://github.community/
Docs	https://docs.github.com/
Contact	https://support.github.com?tags=dotcom-footer

Viewport: width=device-width

URLs of crawlers that visited me.